TECHNOLOGY Zn- Ni Alloy Deposit for Cadmium Replacement Applications

Zinc - nickel alloy was deposited from alkaline bat h at a PH of 13-14 with the nickel percentage of 5- 9% in our prior research. Present study dealt with th e research on 10-12% of Nickel at a PH of 12-13 fr om Zinc ‐ nickel alloy electrolyte and the remaining percenta ge of Zinc, required for corrosion resistant applic ations to be used for reliable alternative of cadmium. Hull cell stu dies was carried out to optimize current density, t emperature, agitation etc., for getting a deposition of 10-12% of Ni & 88-90 % of Zn. SEM, EDAX, XRD measurements characterize the deposit properties and structure. Corrosion resistance measurements such as polarisat ion, corrosion impedance spectra of zinc-nickel alloy were evaluat ed.